Pneumatic organ-action.



0. HAASB.

PNEUMATIC ORGAN ACTION.

APPLICATION FILED Mums, 1913.

1, 1 14,879, Patented Oct. 27, 1914.

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//7 z emars I OTTO HAASE, OF BRAND-ERBISDORF, GERMANY.

PNEUMATIC ORGAN-ACTION.

Application filed March 25, 1913. Serial No. 756,790.

Specification of Letters Patent.

' Patented Oct. 27, 1914.

To all whom it may concern:

Be it known that I, Doctor Ol'lO HAASE, a subject of the Emperor of Germany, residing at Brand-Erbisdorf, District of Freiberg, Saxony, Germany, have invented certain Improvements in Pneumatic Organ- Actions, of which the following is a specification.

The present invention relates to a pneumatic organ action and consists in the combination with an air chamber which is normally in communication with a wind chest and which can be set by the depression of a key into communication with the atmosphere, and a flexible pipe arranged in said chamber in a horizontal position and form ing part of the air pamage leading to the organ pipe, of a weight arranged on said flexible pipe and adapted, while the normal pressure prevails in the chamber, to throttle the air flow in the pipe by flattening the latter. The arrangement is such v that when the pressure in the air chamber is reduced owing to its being set'into communication with the atmosphere, the air in the pipe is capable of lifting the weight and forcing its Way through the pipe.

It is evident that by the provision of the weight, the pressure in the chamber need not exceed the pressure in the pipe. Y

In the accompanying drawings the invention is illustrated, Figure 1 representing a cross-section of the device, and Fig. 2, a longitudinal section of the same.

The pipe a communicates with an air duct 0 part of which is formed of a flexible pipe I), made of leather, rubber or the like. The pipe 6 passes through an air chamber J which normally communicates, by means of a pipe h, with a wind chest tending to maintain in the chamber a pressure of no less magnitude than that prevailing in the pipe I). The pipe h is keycontrolled and adapted, in the usual manner, to put the chamber J into communication with the atmosphere when the key of the particular organ pipe is depressed. The pipe 6 is arranged in a horizontal position and is normally closed by a metal plate k which presses the same by gravity against a support 19, thereby throttling the air flow in the pipe. The weight of the plate is, however, so adjusted that the inside air can lift the plate and pass through the pipe (1 as soon as the chamber J is connected, by the depression of the key, to the atmosphere.

I claim In an organ action, the combination with an air chamber which is normally in communication with a wind chest and which can be set into communication with the atmosphere by the depression of a key, and with a flexible pipe arranged in a horizontal position in said chamber and forming part of an air duct leading to the organ pipe, of a weight carried on the flexible pipe, said weight being adapted to flatten the pipe and keep the air flow throttled except when the air chamber is in communication with the atmosphere.

Docron OTTO HAASE. Witnesses:

PAUL ARRAS, CLARE SIMON. 

